Printer&#39;s quoin.



PATENTED NOV. 3, 1903.

G. B. HUFEINGTON;

PRINTERS QUOIN.

APYLIOATION FILED DEG. 6, 1902.

N0 MODEL.

4 T. ,ln'venior.

f fr.

i Dflrnesses.

' line V V, Fig. I.

No. 74.3,I65.

Patented November 3, 1905'.

P TENT OFFICE.

GEORGE E. I-IUFFINGTON, OF ST. LOUIS, MISSOURI.

PRINTERS QUOIN.

SPECIFICATION forming part of Letters Patent No. 743,165, dated November 3, 1903.

Application filed December 6, 1902. Serial No. 134,067- (No model.) 7

To all whom it may concern.-

Be it known that I, GEORGE B. HUFFING- TON, a citizen of the United States, residing in the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Printers Quoins, of which the following is a full, clear, and exact description reference being bad to the accompanying drawings, forming part of this specification.

My invention relates to that class of printers quoins composed of two wedge-shaped members placed face to face and adapted to be moved longitudinally with respect to each other for wedging action within a printers chase to hold the form located therein.

The invention consists in features of novelty hereinafter fully described, and pointed out in the claim.

Figure I is a side view of my quoin in partially-extended position. Fig. II is a view of the quoin in closed condition and partly in section. Fig. III is a perspective view of one of the wedge members of the quoin. Fig. IV is a transverse section taken on line IV IV, Fig. I. Fig. V is a cross-section taken on Fig. VI is a perspective view of a key used to impart longitudinal movement to the quoin wedge members.

1 designates the wedge members of the quoin, each of which is provided with a head 2 at its widest end that contains a dovetail groove 3.

4. designates dovetail tongues extending longitudinally and centrally of the wedge members 1, each tongue terminating at the base of the dovetail groove 3 in the heads of the members. The dovetail tongue 4 of each wedge member operates inthe dovetail groove 3 of the opposite mating member, and the members are thereby held together, while they are permitted to move longitudinally of each other with the tongues in riding contact during the extension or elongation of the quoin. In the outer ends of the heads 2 are cavities 5, located at the outer terminations of the dovetail grooves 3, and upon the point of each wedge member is an inturned lip 6, that enters the cavity in the head of the opposing member and serves to limit the movement of the wedge members when the quoin is in contracted condition, as seen in Fig. II, thereby preventing separation of the members when the quoinhas been contracted. Thelips 6 are formed integral with the points of the wedge m embers, so as to form rigid parts thereof, and

in the manufacture of the quoin members they are provided with transverse grooves 7 in the ends of the dovetail tongues 4, that permit of the lips being made in a straight line, as seen in Fig. III, with the tongues and afterward bent inwardly on the lines of the transverse grooves 7, as seen in Figs. I and II, in order that they will enter the cavity 5 in the head of the opposing member. At their point ends the wedge members 1 are provided with plain inclined guide surfaces 8, (see Fig. 111,) against which the legs of the head of the op posing wedge member ride in the elongation and contraction of the quoin. Between the head of each wedge member and the inclined guide-surfaces 8 are rack-teeth 9, which are designed to receive the engagement of a key 10, which is introduced between the wedge members and fitted to the rack-teeth, as seen in Figs. I and II. By rotating the key 10 in either direction, according to the movement it is desired to impart to the wedge members of the quoin, the members are caused to ride against each other to either elongate or contract the quoin.

It is a circumstance of frequent occurrence that in the use of printers quoins the rackteeth and the ends of the wedge members in a short time after the quoins are placed in use become upset to a material degree, causing burs or rough edges at the outer ends of the teeth and at the ends, those of the teeth being produced by the tool and those at the ends by the printer striking them. After roughness of the ends of the teeth and the ends of the members has been produced in the manner stated the continued use of the quoins causes injury to the surfaces of import the body of the quoin off of the surfaces mentioned, and prevent contact of the outer ends or faces of the rack-teeth and the ends tions of said dovetail tongues, said tongues IO of the members with surfaces to injure them. being provided with transverse grooves at the I claim as my inventionjunction of said lips and said tongues, sub- A printers quoin comprising a pair of I stantially as set forth. 5 wedge-shaped members having heads pro- 1 vided with dovetail grooves, a tongue extendl HUFFINGTON' ing longitudinally of each member to operate In presence of in said dovetail groove, lips integral with the E. S. KNIGHT, point ends of said members at the terminal N. V. ALEXANDER. 

